10 in total, won in the 1902/03, 1903/04, 1904/05, 1905/06 seasons making the Ottawa Senators the first Stanley cup dynasty team. cups were also won in the 1908/09, 1910/11, 1919/20, 1920/21, 1922/23, 1926/27 season. Often ignored by Leafs fans in thier illogical arguments about how Toronto is some how better.

Leafs Fan - Leafs are better then Ottawa, you guys have never even won a cup
Sens Fan - actualy there are 10 Ottawa Stanley Cups
Leafs Fan - those don't count
Sens Fan - well those Sens are about as related to our franchise as the 1967 Leafs are related to the clowns who wear the Leafs jersey today, also when was the last time you made the playoffs
Leafs Fan - ... ummm Sens suck
Sens Fan - Original